Whip prisoner sporting cut at side of eye (10)
I believe the answer is:
flagellate
'whip prisoner' is the definition.
'flagellate' can be an answer for 'whip' (flagellating is a kind of whipping). I am not sure about the 'prisoner' bit.
'sporting cut at side of eye' is the wordplay.
'sporting cut at' becomes 'flagella' (I can't explain this - if you can you should give a lot more credence to this answer).
'side' becomes 'stem' (stem is a kind of side).
'of eye' says to take the centre (I've seen 'eye' mean this (eye can mean the centre of something)).
The centre of 'stem' is 'te'.
'flagella'+'te'='FLAGELLATE'
Can you help me to learn more?
(Other definitions for flagellate that I've seen before include "Whip" , "Scourge" .)